version 1.104, 2010/06/10 15:54:06
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version 1.105, 2011/02/10 19:28:29
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Line 49 use lib '/home/httpd/lib/perl/';
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Line 49 use lib '/home/httpd/lib/perl/';
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use LONCAPA; |
use LONCAPA; |
use URI::Escape; |
use URI::Escape; |
use IO::Socket::INET; |
use IO::Socket::INET; |
use IO::Socket::SSL; |
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# ====================================================================== Header |
# ====================================================================== Header |
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Line 248 sub mimetex_valign {
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Line 247 sub mimetex_valign {
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my $valign = 0; |
my $valign = 0; |
my $lonhost = $Apache::lonnet::perlvar{'lonHostID'}; |
my $lonhost = $Apache::lonnet::perlvar{'lonHostID'}; |
my $hostname = &Apache::lonnet::hostname($lonhost); |
my $hostname = &Apache::lonnet::hostname($lonhost); |
my $protocol = $Apache::lonnet::protocol{$lonhost}; |
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my $path = '/cgi-bin/mimetex.cgi?'.$esc_texstring; |
my $path = '/cgi-bin/mimetex.cgi?'.$esc_texstring; |
my $socket; |
my $socket; |
&Apache::lonxml::start_alarm(); |
&Apache::lonxml::start_alarm(); |
if ($protocol eq 'https') { |
my $socket = IO::Socket::INET->new(PeerAddr => $hostname, |
$socket = IO::Socket::SSL->new(PeerAddr => $hostname, |
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PeerPort => 'https(443)', |
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Proto => 'tcp'); |
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} else { |
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$socket = IO::Socket::INET->new(PeerAddr => $hostname, |
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PeerPort => 'http(80)', |
PeerPort => 'http(80)', |
Proto => 'tcp'); |
Proto => 'tcp'); |
} |
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if ($socket) { |
if ($socket) { |
my $headreq = "HEAD $path HTTP/1.0\r\n\r\n"; |
my $headreq = "HEAD $path HTTP/1.0\r\n\r\n"; |
print $socket $headreq; |
print $socket $headreq; |
Line 269 sub mimetex_valign {
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Line 261 sub mimetex_valign {
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$valign = $1; |
$valign = $1; |
} |
} |
} |
} |
if ($protocol eq 'https') { |
$socket->close(); |
$socket->close(SSL_no_shutdown => 1, |
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SSL_ctx_free => 1); |
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} else { |
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$socket->close(); |
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} |
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} |
} |
&Apache::lonxml::end_alarm(); |
&Apache::lonxml::end_alarm(); |
return $valign; |
return $valign; |
Line 528 Header
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Line 515 Header
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=item init_math_support() |
=item init_math_support() |
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=item mimetex_valign() |
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Makes a HEAD call to /cgi-bin/mimetex.cgi via IO:: to retrieve the |
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vertical alignment, before the subsequent call to mimetex_converted() |
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which generates the <img> tag and the corresponding image. |
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Input: 1. $esc_texstring (escaped TeX to be rendered by mimetex). |
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Output: 1. $valign - number of pixels: positive or negative integer |
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which will be included in <img> tag for mimetex image to |
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support vertical alignment of image within a line of text. |
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If a server is running SSL, and Apache rewrite rules are in place |
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to rewrite requests for http to https, modification will most likely |
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be needed for pass through for HEAD requests for /cgi-bin/mimetex.cgi. |
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Example rewrite rules which rewrite all http traffic to https, |
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except HEAD requests for /cgi-bin/mimetex.cgi are: |
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<IfModule mod_rewrite.c> |
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RewriteEngine On |
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RewriteLogLevel 0 |
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RewriteCond %{HTTPS} off |
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RewriteCond %{HTTP:Host} (.*) |
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RewriteCond %{REQUEST_METHOD} !HEAD |
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RewriteRule ^/(.*) https://%1/$1 [R=301,L] |
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RewriteCond %{HTTPS} off |
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RewriteCond %{HTTP:Host} (.*) |
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RewriteCond %{REQUEST_METHOD} HEAD |
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RewriteCond %{REQUEST_URI} !^/cgi-bin/mimetex.cgi |
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RewriteRule ^/(.*) https://%1/$1 [R=301,L] |
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</IfModule> |
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=item mimetex_converted() |
=item mimetex_converted() |
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